PPC64 does everything in C, gcc is able to skip calculation
when one of the operands in zero.
Move the constant folding in PPC32 part.
This helps GCC and reduces ppc64_defconfig by 170 bytes.
Signed-off-by: Christophe Leroy
---
arch/powerpc/include/asm/checksum.h | 9 -
1 file changed,
From: Zi Yan
alloc_contig_range() now only needs to be aligned to pageblock_order,
drop virtio_mem size requirement that it needs to be the max of
pageblock_order and MAX_ORDER.
Signed-off-by: Zi Yan
---
drivers/virtio/virtio_mem.c | 7 +++
1 file changed, 3 insertions(+), 4 deletions(-)
From: Zi Yan
CMA only requires pageblock alignment now. Change CMA alignment in
fadump too.
Signed-off-by: Zi Yan
---
arch/powerpc/include/asm/fadump-internal.h | 4 +---
1 file changed, 1 insertion(+), 3 deletions(-)
diff --git a/arch/powerpc/include/asm/fadump-internal.h
b/arch/powerpc/inc
From: Zi Yan
Now alloc_contig_range() works at pageblock granularity. Change CMA
allocation, which uses alloc_contig_range(), to use pageblock_order
alignment.
Signed-off-by: Zi Yan
---
include/linux/mmzone.h | 5 +
kernel/dma/contiguous.c | 2 +-
mm/cma.c| 6 ++
mm/pa
From: Zi Yan
alloc_contig_range() worked at MAX_ORDER-1 granularity to avoid merging
pageblocks with different migratetypes. It might unnecessarily convert
extra pageblocks at the beginning and at the end of the range. Change
alloc_contig_range() to work at pageblock granularity.
Special handlin
From: Zi Yan
Hi all,
This patchset tries to remove the MAX_ORDER-1 alignment requirement for CMA
and alloc_contig_range(). It prepares for my upcoming changes to make
MAX_ORDER adjustable at boot time[1]. It is on top of mmotm-2022-02-08-15-31.
Changelog
===
V5
---
1. Moved isolation address al
From: Zi Yan
has_unmovable_pages() is only used in mm/page_isolation.c. Move it from
mm/page_alloc.c and make it static.
Signed-off-by: Zi Yan
Reviewed-by: Oscar Salvador
---
include/linux/page-isolation.h | 2 -
mm/page_alloc.c| 119 -
mm/pag
From: Zi Yan
Enable set_migratetype_isolate() to check specified sub-range for
unmovable pages during isolation. Page isolation is done
at max(MAX_ORDER_NR_PAEGS, pageblock_nr_pages) granularity, but not all
pages within that granularity are intended to be isolated. For example,
alloc_contig_rang
Dear Michael,
Am 11.02.22 um 15:19 schrieb Paul Menzel:
Am 11.02.22 um 02:48 schrieb Michael Ellerman:
Paul Menzel writes:
Am 08.02.22 um 11:09 schrieb Michael Ellerman:
Paul Menzel writes:
[…]
On the POWER8 server IBM S822LC running Ubuntu 21.10, building Linux
5.17-rc2+ with rcutortur
Dear Michal,
Am 09.02.22 um 13:01 schrieb Michal Suchánek:
On Wed, Feb 09, 2022 at 07:44:15AM +0100, Paul Menzel wrote:
Am 11.01.22 um 12:37 schrieb Michal Suchanek:
[…]
How can this be tested?
Apparently KEXEC_SIG_FORCE is x86 only although the use of the option is
arch neutral:
arc
Le 07/02/2022 à 08:07, Naveen N. Rao a écrit :
> This is an early RFC series that adds support for BPF Trampolines on
> powerpc64. Some of the selftests are passing for me, but this needs more
> testing and I've likely missed a few things as well. A review of the
> patches and feedback about the
Aneesh Kumar K.V writes:
> David Hildenbrand writes:
>
>> On 11.02.22 10:16, Aneesh Kumar K V wrote:
>>> On 2/11/22 14:00, David Hildenbrand wrote:
On 11.02.22 07:52, Aneesh Kumar K.V wrote:
> commit: d9c234005227 ("Do not depend on MAX_ORDER when grouping pages by
> mobility")
...
Constant loading of AMR_KUAP_BLOCKED takes 5 instructions:
c0016a40: 4c 00 01 2c isync
c0016a44: 3d 20 fc ff lis r9,-769
c0016a48: 61 29 ff ff ori r9,r9,65535
c0016a4c: 79 29 07 c6 rldic
Dear Michael,
Am 11.02.22 um 02:48 schrieb Michael Ellerman:
Paul Menzel writes:
Am 08.02.22 um 11:09 schrieb Michael Ellerman:
Paul Menzel writes:
[…]
On the POWER8 server IBM S822LC running Ubuntu 21.10, building Linux
5.17-rc2+ with rcutorture tests
I'm not sure if that's the host ke
A ppc64_defconfig build exhibits about 10 copied of
prevent_user_access(). It also have one copy of set_kuap().
c0017340 <.prevent_user_access.constprop.0>:
c001a038: 4b ff d3 09 bl c0017340
<.prevent_user_access.constprop.0>
c000
On 2/11/22 18:58, Mike Rapoport wrote:
Hi Aneesh,
On Fri, Feb 11, 2022 at 05:22:13PM +0530, Aneesh Kumar K V wrote:
On 2/11/22 16:03, Mike Rapoport wrote:
On Fri, Feb 11, 2022 at 12:03:28PM +0530, Aneesh Kumar K.V wrote:
Keep it simple by using a #define and limiting hugepage size to 2M.
This
Hi Aneesh,
On Fri, Feb 11, 2022 at 05:22:13PM +0530, Aneesh Kumar K V wrote:
> On 2/11/22 16:03, Mike Rapoport wrote:
> > On Fri, Feb 11, 2022 at 12:03:28PM +0530, Aneesh Kumar K.V wrote:
> > > Keep it simple by using a #define and limiting hugepage size to 2M.
> > > This keeps the test simpler in
Hi Ash,
Le 11/02/2022 à 12:29, Michael Ellerman a écrit :
> Ash Logan writes:
>> - Like the Wii before it, the Wii U has a small amount of RAM at address
>> zero, a gap, then a large amount of RAM at a higher address. Instead of
>> the "map everything and reserve the gap" approach of the Wii, we
On 11.02.22 13:23, Aneesh Kumar K.V wrote:
> David Hildenbrand writes:
>
>> On 11.02.22 10:16, Aneesh Kumar K V wrote:
>>> On 2/11/22 14:00, David Hildenbrand wrote:
On 11.02.22 07:52, Aneesh Kumar K.V wrote:
> commit: d9c234005227 ("Do not depend on MAX_ORDER when grouping pages by
>>>
David Hildenbrand writes:
> On 11.02.22 10:16, Aneesh Kumar K V wrote:
>> On 2/11/22 14:00, David Hildenbrand wrote:
>>> On 11.02.22 07:52, Aneesh Kumar K.V wrote:
commit: d9c234005227 ("Do not depend on MAX_ORDER when grouping pages by
mobility")
introduced pageblock_order which
On 2/11/22 16:03, Mike Rapoport wrote:
On Fri, Feb 11, 2022 at 12:03:28PM +0530, Aneesh Kumar K.V wrote:
Keep it simple by using a #define and limiting hugepage size to 2M.
This keeps the test simpler instead of dynamically finding the page size
and huge page size.
Without this tests are broken
Alexey Kardashevskiy wrote:
Disables CONFIG_FTRACE_MCOUNT_USE_RECORDMCOUNT as CONFIG_HAS_LTO_CLANG
depends on it being disabled. In order to avoid disabling way too many
options (like DYNAMIC_FTRACE/FUNCTION_TRACER), this converts
FTRACE_MCOUNT_USE_RECORDMCOUNT from def_bool to bool.
+CONFI
Steven Rostedt wrote:
On Thu, 10 Feb 2022 16:40:28 +
"Naveen N. Rao" wrote:
The other option is to mark ftrace_cmp_recs() as a __weak function, but
I have a vague recollection of you suggesting #ifdef rather than a
__weak function in the past. I might be mis-remembering, so if you think
Ash Logan writes:
> Hello,
Hi Ash,
I can't really answer all your questions, but I can chime in on one or
two things ...
> - Right now I've made a new platform (like ps3) rather than joining the
> GameCube and Wii in embedded6xx, since that is marked as BROKEN_ON_SMP.
> The Wii U is a 3-core sy
On Fri, Feb 11, 2022 at 12:03:28PM +0530, Aneesh Kumar K.V wrote:
> Keep it simple by using a #define and limiting hugepage size to 2M.
> This keeps the test simpler instead of dynamically finding the page size
> and huge page size.
>
> Without this tests are broken w.r.t reading /proc/self/pagema
In the same spirit as commit 07064c6e022b ("net: Allow csum_add to be
provided in arch"), allow csum_sub() to be provided by arch.
The generic implementation of csum_sub() call csum_add() with the
complement of the addendum.
Some architectures can do it directly.
This will also avoid getting sev
When building kernel with CONFIG_CC_OPTIMISE_FOR_SIZE, several
copies of csum_sub() are generated, with the following code:
0170 :
170: 7c 84 20 f8 not r4,r4
174: 7c 63 20 14 addcr3,r3,r4
178: 7c 63 01 94 addz
On 11.02.22 10:16, Aneesh Kumar K V wrote:
> On 2/11/22 14:00, David Hildenbrand wrote:
>> On 11.02.22 07:52, Aneesh Kumar K.V wrote:
>>> commit: d9c234005227 ("Do not depend on MAX_ORDER when grouping pages by
>>> mobility")
>>> introduced pageblock_order which will be used to group pages better.
On 2/11/22 14:00, David Hildenbrand wrote:
On 11.02.22 07:52, Aneesh Kumar K.V wrote:
commit: d9c234005227 ("Do not depend on MAX_ORDER when grouping pages by
mobility")
introduced pageblock_order which will be used to group pages better.
The kernel now groups pages based on the value of HPAGE_
Building a kernel with CONFIG_CC_OPTIMISE_FOR_SIZE leads to
the following functions being copied several times in vmlinux:
31 times __ilog2_u32()
34 times fls()
Disassembly follows:
c00f476c :
c00f476c: 7c 63 00 34 cntlzw r3,r3
c00f4770: 2
Today's implementation of csum_shift() leads to branching based on
parity of 'offset'
02f8 :
2f8: 70 a5 00 01 andi. r5,r5,1
2fc: 41 a2 00 08 beq 304
300: 54 84 c0 3e rotlwi r4,r4,24
304: 7c
On 11.02.22 07:52, Aneesh Kumar K.V wrote:
> commit: d9c234005227 ("Do not depend on MAX_ORDER when grouping pages by
> mobility")
> introduced pageblock_order which will be used to group pages better.
> The kernel now groups pages based on the value of HPAGE_SHIFT. Hence
> HPAGE_SHIFT
> should b
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